. >> president has made clear, he has told congress he will not sign a bill, if it fixes defense at expense of domestic spending, congress has it write bills that meet challenge. >> lew making his comments after washington post reports that top obama administration officials are pushing strategy that would lead to a government shut down if republicans continue to demand spending cuts and refusen to the sequester, and furthering administration stone call of irs targets of conservatives. fox news sunday host chris wallace asking lew if irs chief council, william wilkins had been questions by authorities yet. an office that reports to the treasury department. lew refused to answer the question, take a listen. >> somebody in treasury department ask william wilkins what he knew about this. >> chris, there is no evidence this went to any political official. >> there has not been an investigation. >> a lot of time has gone to asking a lot of questions of a lot of people, i'm not saying it is done, and we'll cooperate with all of the o ongoing investigation, i'm just challenges your assersion that